Maruthanayagam Pillai (1725 – 15 October 1764), was the commandant of the British East India Company's Madras Army . He was born in a Tamil Vellalar family in a village called Panaiyur in British India, what is now in Nainarkoil Taluk, Ramanathapuram District of Tamil Nadu, India. He converted to Islam and was named Muhammad Yusuf Khan. He was popularly known as Khan Sahib when he became a ruler of Madurai. He became a warrior in the Arcot troops, and later a commandant for the British East India Company troops. The British and the Arcot Nawab employed him to suppress the Polygar (a.k.a. Palayakkarar) uprising in South India. Later he was entrusted to administer the Madurai country when the Madurai Nayak rule ended.